Just an add on to what you have above. The term Cape Gun comes from the sales pitch used by British Gunmakers to describe guns which were frequently sold to Farmers and Landowners in the Cape Colony of South Africa. They were normally of side by side construction with one barrel shotgun and the other rifled in order that they could be used for a variety of purposes. Shot for smaller game and the rifle barrel for more dangerous stuff. Most common are 12 or 16 bore in the shotgun and .577 or .450/577 in the rifle. These two rifle calibres, especially the latter, were in common use in that area being of military calibres with plenty of ammunition obtainable. A Dealer friend may have one coming in soon of which I have first refusal. The rifle is .450/577 and I believe the shotgun part is 16 bore. Lagopus.....